can't select "Set" in drop down box
I would like to report a bug that i found on my ID. As I circled in picture below, normally on Enhance Equipment page we can select "Set" in drop down box to arrange the equipment but for my ID I can't select "Set" in drop down box to arrange my equipment in "Set" order. How can I fix this issue could you give me some advice to deal with this problem (I already uninstall and re-install app but can't fix this issue).
Thank you in advance